Process for obtaining highly esterified polyol fatty acid polyesters having reduced levels of difatty ketones and .beta.-ketoesters
US6303777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1994 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Jul 6, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/48
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved, solvent-free, two-stage transesterification process for preparing, from a polyol and fatty acid esters of an easily removable alcohol highly esterified polyol fatty acid polyesters having reduced levels of difatty ketones and .beta.-ketoesters is disclosed. These reduced levels of difatty ketones/.beta.-ketoesters are achieved by controlling the level of generated alcohol in the liquid phase of the reaction mixture and heating the reaction mixture to certain temperatures during the second stage of this improved process. Other optional reaction conditions, such as keeping the molar ratio of fatty acid esters to polyol within a specified range and reducing the level of basic catalyst, can also be used during the second stage reaction to further reduce the level of difatty ketones and/or .beta.-ketoesters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.